As regards the question: “How did he come out of the house with the gun, when he didn’t keep guns in the house?” there is a logical answer. The article says he kept the gun in his vehicle. He probably had an attached garage (which some would consider part of the house). Perhaps he kept the vehicle locked and out of the sun in the garage. Perhaps after he saw the perps breaking in the house, he went and retrieved his car keys, went down through the kitchen, into the garage, unlocked the vehicle, retrieved the gun and went back into the house to see what progress the perps had made.
Sounds like a reasonable assumption.
Let’s see him ‘splain that one to his wife.
That's exactly what the article on a local (Houston) TV station's website said. He went to the garage and retrieved it out of the truck. An aerial photo of the neighborhood shows attached garages, along with pools in many yards, and moderately large lots. The houses on one side of the street back up to a creek or bayou.